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34653 Datasheet(数据表) 1 Page - Freescale Semiconductor, Inc |
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34653 Datasheet(HTML) 1 Page - Freescale Semiconductor, Inc |
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Document Number: MC34653 Rev. 8.0, 2/2007 Freescale Semiconductor Advance Information * This document contains certain information on a new product. Specifications and information herein are subject to change without notice. © Freescale Semiconductor, Inc., 2007. All rights reserved. 1.0 A Negative Voltage Hot Swap Controller The 34653 is a highly integrated -48 V hot swap controller with an internal Power MOSFET. It provides the means to safely install and remove boards from live -48 V backplanes without having to power down the entire system. It regulates the inrush current, from the supply to the load’s filter capacitor, to a user-programmable limit, allowing the system to safely stabilize. A disable function allows the user to disable the 34653 manually or through a microprocessor and safely disconnect the load from the main power line. The 34653 has active high and active low power good output signals that can be used to directly enable a power module load. Undervoltage and overvoltage detection circuitry monitors the input voltage to check that it is within its operating range. A start-up delay timer ensures that it is safe to turn on the Power MOSFET and charge the load capacitor. A two-level current limit approach to controlling the inrush current and switching on the load limits the peak power dissipation in the Power MOSFET. Both current limits are user programmable. Features • Integrated Power MOSFET and Control IC in a Small Outline Package • Input Voltage Operation Range from -39 V to -74 V • Programmable Overcurrent Limit with Auto Retry • Programmable Charging Current Limit Independent of Load Capacitor • Start-Up and Retry Delay Timer • Overvoltage and Undervoltage Detection • Active High and Low Power Good Output Signals • Thermal Shutdown • Pb-Free Packaging Designated by Suffix Code EF Figure 1. 34653 Simplified Application Diagram HOT SWAP 34653 ORDERING INFORMATION Device Temperature Range (TA) Package MCZ34653EF/R2 -40°C to 85°C 8 SOICN MC34653EF/R2 EF SUFFIX (Pb-Free) 98ASB42564B 8-PIN SOICN 34653 DISABLE VPWR ILIM VIN VOUT PG PG ICHG GND -48 V System Power Supply (Backplane) Optional External Components Optional External Components Load Application Dependent |
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